CM7 Battery Life - Fascinate Q&A, Help & Troubleshooting

Hey everyone,
I am currently running jt's stock gingerbread ROM and I am having a hard time even making it through the day on battery life. Does anyone have suggestions on extending battery life besides the basic turn of notifications and turn down the brightness? Is the glitched kernel better on the battery life? Anyway thanks in advance!
Sent from my SCH-I500 using XDA App

---

heric1 said:
Hey everyone,
I am currently running jt's stock gingerbread ROM and I am having a hard time even making it through the day on battery life. Does anyone have suggestions on extending battery life besides the basic turn of notifications and turn down the brightness? Is the glitched kernel better on the battery life? Anyway thanks in advance!
Sent from my SCH-I500 using XDA App
Click to expand...
Click to collapse
CM7 has pretty great battery life for me. Open a terminal and run 'dumpsys power' command to see if you have any wakelocks.

---

when trying to run that command I get the following messgae:
'Permission denial: can't dump PowerManager from the pid=857 . uid=10021

---

type 'su' first to get superuser permissions.

---

Still get 'permission denied.' Sorry for being a noob and thanks for the help thus far!

---

Just to clarify, type su first, then hit enter. You should get a superuser request. After allowing, your prompt should become a # sign, then you can dump the power log.
Sent from my SCH-I500 using XDA Premium App

---

artvandelay440 said:
CM7 has pretty great battery life for me. Open a terminal and run 'dumpsys power' command to see if you have any wakelocks.
Click to expand...
Click to collapse
How great is your battery life? Like how many hours of use do you get out of your phone usually (how much is the phone in use, screen on, etc.)?

---

Here is what I got:
export PATH=/data/local/bin:$PATH
$ export PATH=/data/local/bin:$PATH
$ su dumpsys power
Permission denied
$ su dumpsys power
Permission denied
$su
#dumpsys power
Power Manager State:
mIsPowered=false mPowerState=3 mScreenOffTime=1718215 ms
mPartialCount=0
mWakeLockState=
mUserState=SCREEN_BRIGHT_BIT SCREEN_ON_BIT
mPowerState=SCREEN_BRIGHT_BIT SCREEN_ON_BIT
mLocks.gather=
mNextTimeout=3621632 now=3615698 5s from now
mDimScreen=true mStayOnConditions=0
mScreenOffReason=2 mUserState=3
mBroadcastQueue={-1,-1,-1}
mBroadcastWhy={0,0,0}
mPokey=1 mPokeAwakeonSet=false
mKeyboardVisible=false mUserActivityAllowed=true
mKeylightDelay=6000 mDimDelay=47000 mScreenOffDelay=7000
mPreventScreenOn=false mScreenBrightnessOverride=-1 mButtonBrightnessOverride=-1
mScreenOffTimeoutSetting=60000 mMaximumScreenOffTimeout=2147483647
mLastScreenOnTime=28145820
mBroadcastWakeLock=UnsynchronizedWakeLock(mFlags=0x1 mCount=0 mHeld=false)
mStayOnWhilePluggedInScreenDimLock=UnsynchronizedWakeLock(mFlags=0x6 mCount=0 mHeld=false)
mStayOnWhilePluggedInPartialLock=UnsynchronizedWakeLock(mFlags=0x1 mCount=0 mHeld=false)
mPreventScreenOnPartialLock=UnsynchronizedWakeLock(mFlags=0x1 mCount=0 mHeld=false)
mProximityPartialLock=UnsynchronizedWakeLock(mFlags=0x1 mCount=0 mHeld=false)
mProximityWakeLockCount=0
mProximitySensorEnabled=false
mProximitySensorActive=false
mProximityPendingValue=-1
mLastProximityEventTime=0
mLightSensorEnabled=true
mLightSensorValue=6.0 mLightSensorPendingValue=-1.0
mLightSensorScreenBrightness=20 mLightSensorButtonBrightness=255 mLightSensorKeyboardBrightness=0
mUseSoftwareAutoBrightness=true
mAutoBrightessEnabled=false
mScreenBrightness: animating=false targetValue=-1 curValue=30.0 delta=2.0
mLocks.size=0:
mPokeLocks.size=1:
poke lock 'PhoneApp': POKE_LOCK_IGNORE_CHEEK_EVENTS

---

I usually get around 16-20 hours with moderate usage.
The mLocks at the bottom is your wake locks, so you don't have any. Congratulations you do have a poke lock, which is preventing deep sleep. Try rebooting and dump it again.
Sent from my SCH-I500 using XDA Premium App

---

16-20 hours with moderate usage...maybe I'm just setting too high of expectations haha! Regardless thank you!

---

As long as it lasts til it goes on the charger at night
Sent from my SCH-I500 using XDA Premium App

---

artvandelay440 said:
As long as it lasts til it goes on the charger at night
Sent from my SCH-I500 using XDA Premium App
Click to expand...
Click to collapse
Unfortunately, it doesn't. The phone discharges 70% in 16 hours (35% in 8 hours) if it is untouched. That gives me effectively 30% to play with over a full day. Between reading email, occasional texting and a quick phone call that 30% doesn't come a long way.

---

You might want to try recalibrating your battery. You can either do this manually in cwm, or just look for battery calibration in the market if you aren't quite comfortable doing so in cwm. Instructions are generally: charge to 100%, wipe batterystats.bin in cwm, use phone normally, allowing phone to drain completely, then charge uninterrupted back to 100%.
Sent from my SCH-I500 using XDA Premium App